Coordination of Reliability and Economy in the operation Planning of Power Systems（I）

摘要

The reliability assessment of power systems has become important with their rapid growth and increesing complexity. So，about the short-range schedule of power system operation，advance　from the deterministic and economic schedule， we must determine the　short-range　schedule of power systems operation　from　the　stand point　of　coordination of economy　and　reliability　considering　random　elements　within　power system.　　In this paper， we propose a new reliability index for the short-range operation and　consider the schedule　of　operation involving the co-ordination of economy and reliability.　　At first，in relation to the well-known long-range Loss of Load Probability(LOLP) and itu27s set value， we consider the set value of short-range LOLP and itu27s equivalent Security level.　　Then，we introduce a new index Security Margin， which can evaluate how an operating schedule can attain itu27s reliability goal and refer to the method to determine the co-ordinated operating schedule using this index.　　Appling this method to the model power system， we prove the usefulness of the proposed method.